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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abbbbc12c4963a15c396698428973c15a910ed1a01fc88217a4010abc330b38b' 
  AND token = 'ETt3CrSZ6Ggz81octRv1TVMZNPSFfn4B0J8A1DPhWRo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}